Heat pump coils are a key part of the heat transfer system ... (Although, sometimes this noise can be the heat pump fan not working properly because the bearings wear over time).

some heat pumps have an electric heat strip added to the indoor fan coil for improved heating capabilities. A heat pump's refrigerant transfers heat into or out of the house, depending on whether ...

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The heat pump is assumed to have a rated capacity of 9 kW in the heating mode and 8 kW in the cooling mode. In the proposed system configuration, a fan coil unit (FCU) is switched on when the room ...